Gage.



P. LOHMAN.

GAGE. APPLIcATIoN FILED snP'r. 24, 190e.

956, 1 1 6. Patented Apr. 26, 1910.4

l annua-6W.

F. LOHMAN.

. GAGE.

APPLIcATloN FILED SEPT. 24, 190e.

956,1 1 6. l Patented Apr. 26, 1910.

2 SHEETS-SHEET 2.

inventor Fred Lohman. j witnoaa G2 i i y t M I l atmnm FRED LOHMAN, 0FLOS ANGELES, CALIFORNIA.

GAGE.

Specification of Letters Patent.

Application led September 24, 1908.

Patented Apr. 26, 1910.

seriai No. 454,558.

To all whom At may concern:

Be it known that I, FRED LOHMAN, a citizen of the United States,residing at Los Angeles, in the county of Los Angeles and State ofCalifornia, have invented certain new and useful Improvements in Gages,of which the following is a specification.

This invention relates to gages, and more particularly to mortisemarking gages, and has for its object to provide such a deviceparticularly adapted to use for locating locks upon doors.

Another object is to provide such a device which at the same time it isset for making the location of locks in the edge of a door, is adaptedto indicate a proper point on the door frame for the location of thestrike.

Another object is to provide such a device for indicating the exactpoint at which to place the center of a bit when boring to mortise adoor for a lock.

Another object is to provide such a device having independently operablesliding points adapted to mark the center for a mortise and the widththereof, the points for marking the width being adapted to be adjustedafter the center point is adjusted without liability of interference ofthe separate adjusting means.

Another object is to provide a device having a flange for engagementwith the side of a door when marking the door for mortising, and havingother flanges so oil"- set that the mortise for the strike may bel'ocaled by similar engagement with the door jam Other objects andadvantages will be apparent from the following description, and it willbe understood that changes in the specific structure shown and describedmay be made within the scope of the claims, and that any suitablematerials may be used without departing from the spirit of theinvention.

In the drawings forming a portion of this specification, and in whichlike numerals of reference indicate similar parts in the several views,Figurel is a longitudinal sectional View of the device, Fig. 2 is a topplan view of the device, Fig. 3 is a bottom view of the device, Fig. 4is an edge view of the device, Fig. 5 is a horizontal sectional view.Fig. 6 is a longitudinal sectional view through the operating member andpointers.

Referring to the drawings, there is shown a gage comprising a casing 10including spaced plates `11 and 12 having registering slots 13 extendinglongitudinally thereof. End walls 14 and 15 support the plates 11 and 12in spaced relation. Laterally extending ilanges 16 and 17 are carried atopposite ends of the plate 11, the flange 1(3 being offset outwardly ofthe end of the wall 14: to bring its inner face into the same plane withthe outer face of the wall 14 as shown. A flange 18 is carried by theouter plate 12 extending oppositely of the one17, its inner face lyingin the same plane as the outer face of the flange 17. Registeringopenings are formed through the walls 14 and 15 adjacent to the oppositeends of the slots 13. Secured between the plates 11 and 12, and eX-tending longitudinally between the slots 13, there is a tube 19V havinglongitudinal slots 20 therein registering with the slots 13. Engagedrevolubly and slidably in the tube 19 there is an operating shaft 22having a head portion 23, and a rack portion 24, comprising a series ofspaced peripheral rack ribs, and having point carrying portionscomprising a central shaft portion 24 having shoulders 25 at oppositesides thereof, and outwardly of said shoulders there are formed rightand left hand threads 27 extending to the rack portion 211 on one side,and the outer end of the operating member 22 at the other side. Abracket 28 is carried by the case 10 at one end adjacent to the member22, and carries revolubly a rack gear 29 engaged with the rack portion211, having an operating head 30 connected therewith, and adapted toreciprocate the shaft 22 upon the manipulation of the operating head 30,thereby adjusting the point member 31. Engaged upon the shaft 24J thereis a pointer member 31 extending outwardly through the slot 13 in theplate 11. On opposite sides of the pointer 31 there are pointers 32 eachhaving outwardly extending points engaged through the slots 13 in eachof the plates 11 and 12, as shown. The members 32 are arranged inthreaded engagement with respective portions 27 of the operating member22, for opposite sliding movement when the member 22 is rotated.

Carried by the bracket 28 there is a set screw 34 adapted for operationto impinge against Y the member 22 to hold it against longitudinalmovement. The bracket 28 comprises spaced arms 36 having their endportions turned outwardly and secures to the flange 17 of the case 10and carrying the gear 29 revolubly therein by means of a shaft 38 asshown. The set screw 34 is engaged through a perforated flange 40 turnedlaterally from one of the arms of the bracket 28, as shown. A suitablescale is marked on the plate 11 adjacent to the slot 13 for a purpose tobe subsequently indicated. f

v'In operation, to mortise a door for the reception of a lock having aface plate of a known width the gear 29 is rotated by manipulation ofthe head 30 to move the member 22 and bring the point 31 to a distancefrom the flange 16 equal to the distance which it is desired that thecenter of the face plate of the lock shall have from the inner edge ofthe door when closed. The member 22 is then rotated by suitablemanipulation of the head 23 to move the points 32 oppositely of eachother to space them a distance equal to the Width of the face plate. Thedevice Vis then brought into engagement with the edge of the door, theflange 16 being disposed upon `the inner face of the door which is toabut the jamb, and moved vertically with the points 31 and 32 in contactwith the face of the edge portion of the door to demark the Width forthe mortise.

To locate the mortise for the strike in the door frame, the plate 12 ispresented against the face ofthe frame with the wall 14 in contact withthe'jamb, and the demarcation for the mortise made as above described.It will thus be seen that the center of the space between the points 32is the Y same distance froml the edge of the jamb'and adjacent face ofthe door. The catch of the lock when in place will thus be brought intoaccurate registry with the outer edge of the opening inthe strike forfirm latching engagement.

The flange 17 is adapted for similar use to the flange 16` on theopposite face of the door, and the flange 18 is adapted for cooperationtherewith to mark the lines for a mortise in a door frame Where the stopis to be what is termed loose by builders; that is, the latch fitsloosely in the stop plate.

The pointers 32 comprise interiorly threaded collars engaged upon thethreaded portion 27 of the member22 having oppositely extending pointersengaged through the slots 20 and 13 to prevent rotation of the pointers,and allow of proper engagement with a surface to be marked. The pointer31 is similarly constructed with the exception that the collar wouldhave to be split upon the central 4line made by the point 31 which willthus obviate any danger of bor:`

ing beyond the width of the face plate.

What is claimed is: Y y 1. An article of the class described comprisingspaced slotted plates carrying a plurality of points extending throughsaid slots,V

means for moving said points relatively longitudinally of said slots,and a liange carried by one of said plates, and offset out'- wardly ofthe adjacent end of the other plate, and adapted for engagement over theedge face of a door to bring said points into engagement therewith at apredetermined distance from said flange, the outer of said oppositeplates being adapted to contact with a door j amb to bring the pointersinto engagement with a door frame rat a distance from the jambcorresponding with the dis? tance of said points from said flange.

2. A marking gage comprising spaced slotted members, a plurality ofslidable points disposed between said Vmembers and projecting throughthe slots, means for moving said points in the slots, relatively withrespect to each other, and oset ianges carried by one of the plates, andextending laterally of said slots.

3. A gage comprising spaced slotted plates, flanges carried by one ofsaid plates transversely of the slots, said flanges being offset withrelation to the ends of the plates, a right and left threaded shaftrevolubly mounted between said plates, said shaft having a non-threadedportion between 'said' right and left threads, marker members engagedupon said threaded portions of the shaft, a marker member engagedrevolubly upon said unthreaded portion, said shaft having a head thereonadapted for manipulation to rotate the shaft, and means for operatingsaid shaft longitudinally 'with respect to said slots.

4. An article of the class described comprising spaced slotted plates,flanges carried at oppositeV ends of the plates, lsaid flanges beingoffset with relation to the ends ofthe plate, a slotted sleeve carriedbetween the plates, a shaft disposed slidably in vthe sleeve, said shafthaving a series of peripheral ratchet ribs adjacent to one end, and

having right and left threads formed uponk the opposite end portion, aportion of the shaft between said threaded portions being unthreaded andprovided With peripheral shoulders at opposite ends thereof, a marker 5member engaged upon said threaded por- 10 rotating theshaftindependently of the 1ongitudinal movement, and means for securing theshaft at times against both of said movements.

In testimon whereof I aiX my signature, in presence o two witnesses.

FRED LOHMAN.

Witnesses:

O. F. SCI-IERER, R. D. TINKLEPAUGH.

